Ansible Date struggle

[ns27...@gmail.com]

Hi I am new to Ansible .

I am some issues working with dates .I want to get the difference between two dates in seconds  or minutes .

I created two ec2 instance and was able to retrieve the launch times using below 

name: launch time and date of EVC and ansible date 

  debug:

     var: item.launch_time

     with_items: "{{ ec2_facts.instances }}"

also i was able to get the ansible date using .

- name: launch time and date of EVC and ansible date 

   debug:

  date: ansible_date_time.iso8601_micro.date

What i am not able to do is store these variables in a date variable and then subtract them and get this difference .

Could you guys help me ?

Regards,

NS